package org.infinispan.persistence.jpa.impl;
import java.io.Serializable;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import javax.persistence.Embeddable;
import org.infinispan.commons.util.Base64;
import org.infinispan.persistence.jpa.JpaStoreException;
/**
*
* Embedded entity which serves as primary key for metadata. Bytes representing the key are hashed
* via SHA-256.
*
* @author vjuranek
*/
@Embeddable
public class MetadataEntityKey implements Serializable {
private static final long serialVersionUID = 73757405630621L;
private static final String DIGEST_ALG = "SHA-256";
private String keySha;
public MetadataEntityKey() {
}
public MetadataEntityKey(byte[] keyBytes) {
keySha = getKeyBytesSha(keyBytes);
}
public String getKeySha() {
return keySha;
}
public void setKeySha(String keySha) {
this.keySha = keySha;
}
@Override
public boolean equals(Object o) {
if (o == null || !(o instanceof MetadataEntityKey))
return false;
return keySha.equals(((MetadataEntityKey) o).getKeySha());
}
@Override
public int hashCode() {
return keySha.hashCode();
}
public static String getKeyBytesSha(byte[] keyBytes) {
String keyBytesSha;
try {
MessageDigest digest = MessageDigest.getInstance(DIGEST_ALG);
byte[] sha = digest.digest(keyBytes);
keyBytesSha = Base64.encodeBytes(sha);
} catch(NoSuchAlgorithmException e) {
throw new JpaStoreException("Failed to create SHA hash of metadata key", e);
}
return keyBytesSha;
}
@Override
public String toString() {
return "MetadataEntityKey{keySha='" + keySha + "'}";
}
}